Just a thought. And I realize there are different ideas as to what "femininity" is. I honestly think my wife is jealous of my clothing, my sense of style, and my ability to switch back and forth masculine to feminine.
My wife was always was a tomboy, always liked (still likes) sports, grew up on a farm, and was the youngest of three girls - everyone was hoping for a boy. I think as a youngster she filled that role for her dad, and never learned how to express her femininity.
For myself....I was always into the girls clothing, and from the age of three or four have been dressing. I guarantee I wear dresses, skirts, nylons, and heels MUCH MUCH more often than she ever did. While I don't think this is a HUGE issue for her, I sometimes sense the jealousy in that I'm more comfortable expressing my femininity than she is.
This isn't a show stopper by any means, but it's still there. I sometimes think it would be interesting for me to take over that role completely, but we've got the kids here and I'm not that sure she'd be into it.
Anyone have a similar experience with their wife/spouse/significant other?